111. The concept of ellipitical orbitals was suggested by
A. Thomson
B. Neil Bohr
C. Rutherford
D. Sommerfeld
112. Water drops are spherical because of
A. polarity
B. viscosity
C. surface tension
D. density is one
113. Aspirin is
A. ethyl salicylate
B. methyl salicylate
C. sodium salicylate
D. acetyl salicylic acid
114. Periodic table was given by
A. Faraday
B. Lavoisier
C. Arrhenius
D. Mendeleef
115. Bauxite is an ore of
A. copper
B. zinc
C. aluminium
D. iron
116. Aluminium oxide is a/an
A. basic oxide
B. acidic oxide
C. neutral acid
D. amphoteric acid
117. Ruby is an oxide of
A. silver
B. gold
C. platinum
D. aluminium
118. Tobacco is preserved from drying out in
A. acetone
B. glycol
C. ethanol
D. glycerol
119. Which synthetic fibre is known as artificial silk?
A. Nylon
B. Rayon
C. Cotton
D. Terylene
120. Which variety of glass is heat resistant?
A. bottle glass
B. flint glass
C. hard glass
D. pyrex glass
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